碳酸氢铵沉钒新工艺试验研究

以石煤湿法提钒工艺萃取和反萃取所得富钒液为原料,分析了富钒液中V 2O5、酸度以及杂质含量,研究了使用铵盐替代氨水的沉钒新工艺。研究结果表明:以杂质含量高、杂质种类复杂的富钒液为原料,采用40%碳酸氢铵为沉钒剂进行沉钒,控制加入量为理论量的1.4倍,溶液pH值为0.9,反应温度60℃,能够稳定制备出纯度为99.5%的V 2O5,沉钒率达96.9%以上,母液沉降温度22℃,降低了氨氮含量,工业试验效果良好。

The experiment used rich vanadium solution as the raw material, which come from wet v technology experiment with stone coal by extraction and reverse extraction, through analyzing V2O5, acidity and the content of impurity in the rich vanadium liquid, we studied a new process of vanadium using ammonium salt instead of ammonia. The results show that ： with rich vanadium liquid that had high content of impurities and types of impurity complex as raw material, used 40% NH4HCO3 solution as vanadium agent to precipitate separation vanadium, Control the addition 1.4 times of theory, solution pH value is 0.9, reaction temperature is 60℃, it can stably prepare 99.5% V2O5. vanadium rate is above 96.9%, mother liquor settlement temperature of 22℃, the ammonia-Nconcentration is reduced, industrial test result is good.